Elevator safety appliance.



H. PIRON & W.' MBRKEL.

ELEVATOR SAFETY PPLIANGE.

APPLICATION FILED JAILZB, 1908.

Pa'tentedJune 1, 1909.

2 SHEETS-SHEET 1.

flame/35kt C/adn) Rs co4, wAsHlNcroN. n. c.

rma Nam:

H. PIERON I W. MERKBL.

ELEVATOR SAFETY APPLIANGE. APPLICATION FILED JAN. za, 1908.

923,574. Patented June 1, 1909.

2 SHEETS-SHEET 2.

6% A y/yz@ @ffm zz@ weeg THE MORRIS PETERS ca.. wAsmNafoN. n. f:4

HUGO PIRON AND WILHELM MERKEL, OF REMSCHEID, GERMANY.

ELEVATOR SAFETY APPLIANCES.

Specification oi Letters Patent.

Patented June 1, 1909.

Application led January 28, 1908. Serial No, 413,060.

.To allwhom it may concern:

Be it known that we, HUGO PIRON, engineer, and ILHELM MERKEL, merchant, citi- Zens of Germany, subjects of the King of Prussia and Emperor of Germany, residing at Remscheid, in the Kingdom of Prussia and Empire of Germany, have invented certain new and useful Improvements in Elevator Safety Appliances, of which the following is a full, clear, and exact description.

This invention relates to elevator safety appliances, and has for its purpose to provide such a means embodying certain features whereby the car or cage is not subjected to a sudden jar or stop in event of the breaking of the supportingI cable, but instead where such stop is rendered gradual or cushioned.

ln the present day type of safety appliance embodying the double or auxiliary cable feature, said cable has usually the function of actuating a safety or catch device carried by the moving car, and is therefore subjected to strain in a manner similar to that of the main or supporting cable, thus rendering its operation more or less ineffective in cases of emergency.

My invention utilizes the second cable idea but that cable itself constitutes the safety appliance proper, i. e. it holds the car in suspension in event of the breaking of the main cable. Means is provided whereby the connection of the second cable with the car readily permits of said cable being lengthened or shortened to compensate for any varying in length of the supporting cable, as by reason of wear or otherwise.

lith these and other objects in view that will be clear in the course of the following detailed description, and particularly pointed out in the appended claims, my invention is illustrated in its preferred embodiment in the accompanying drawings wherein:

Figure 1 is a diagrammatic view of the apparatus complete. Fig. 2 is a transverse sectional view taken on the line A-B of Fig` l, Fig. 3 is an end elevation of Fig. 1, and Fig. 4 shows, partly in section, the auxiliary cable connection and cushioning mechanism.

Referring in detail to the several figures wherein the reference characters designate corresponding parts in the different figures shown, a indicates the ordinary supporting cable for the cage or car c, and l) refers to the auxiliary or emergency cable that is likewise attached to the car, and runs uniformly and parallel with the lifting cable c. Said cables a and l) are operated by the drums e and f, which drums may be intergeared in any appropriate manner, the former of said drums being that preferably connected with the driving engine. lt will therefore be observed that in this construction both the lifting and emergency cables are operated simultaneously, thus overcoming any tendency for either of the cables to sag, as would occur were they connected with independent and distinct winding mechanism.

The car lifting cable a is attached to the elevator car in any appropriate manner. The emergency lifting cable b is likewise attached to the car, but in a manner now described in detail. The mechanism constituting this emergency cable connection comprises a drum d and an adjustable cylinder i, the former being connected to the latter by a spiral spring connection g whereby said members may have substantially independent movement, and yet be caused to move sequentially. The resilient connection g is carried almost wholly by the drum d for which pur ose said drum is provided with a cylindricaf recess, as shown in section in Fig. 4. The cylindrical portion fi is provided near one end with a worm wheel 7L adapted to be engaged by a manually manipulated screw h whereby said cylinder i may be revolved upon its supporting shaft, the purpose of which adjustment is to lessen or in crease the relative tension between said cylinderi and the drum d when the oar is in suspension. By this adjustment it will be readily perceived that proper tension may always be had on the emergency cable l) and that should the ordinary lifting cable break the weight of the car would then be transferred to cable l); but in the taking up of this weight any tendency to shock or is avoided by a resilient control of the drum d. This gradual assumption of the weight of the car c by the emergency cable l) is finally stopped or in a manner made permanent by reason of the opposed lugs or shoulders f: and l carried by the drum (l and cylinder fi respectively. lt will therefore bo clear by reference to Figs. l and 4 that after the drum d has turned a distance sufficient to cushion the sudden transfer of the cars suspension, the shoulder le on said drum is brought into engagement with its complementary member l on the cylinder t', the latter serving as a fixed part.

rlhe mechanism thus described is mounted in a framework of any suitable construction,

arranged preferably on the top of the car whereby ready access may be had thereto, and wherein its regulation and control is conveniently in reach of the car conductor.

What We claim as new is:

l. The combination with an elevator car and its hoisting cable, of an emergency supporting cable, and means for cushioning` said cable when strain is brought thereon, said means comprising a spring controlled drum upon which said cable is adapted to be wound.

2, The combination with an elevator car and its hoisting cable, of an emergency supporting cable, and means for cushioning said cable when strain is brought thereon, said means comprising a shaft rotatable members mounted on said shaft, tensioning means for one of said members, and means for effecting engagement between said rotatable members whereby to regulate said tension means.

3. The combination with an elevator car and its hoisting cable, of an emergency supporting cable, and means for cushioning said cable when strain is brought thereon, said means comprising' a normally iixed and a movable member, tensioning' means for the movable member, engaging means for said members whereby to hold the movable member when the supporting cable breaks, and

l means for turning the iiXed member whereby l to tension the emergency cable.

4. The combination with an elevator car l and its hoisting cable, of an emergency supl porting cable, and means for cushioning said cable when strain is brought thereon, said means comprising a shaft a spring controlled drum mounted en said shaft, a cylinder mounted on said shaft, and having means adapted to engage the drum, and means for turning said cylinder whereby to tension the drum spring.

5. r[he combination with an elevator car and its hoisting cable, of an emergency supporting cable, and means for cushioning said cable when strain is brought thereon, said means comprising a shaft a spring controlled drum mounted on said shaft carried by the car, a cylinder mounted on said shaft and having means adapted to engage the drum, and screw and worm gearing for turning said cylinder whereby to effect said engagement and tension the drum spring.

ln witness whereof, we subscribe our signatures, in presence of two witnesses.

HUGO PIRON. WILHELM MERKEL.

"if'z'vitnesses:

Gr'ro KNIG, e le."AsHiNGToN BRUNsAn'). 

